Pull line drum and mounting



Aug. 31, 1943. w. w. FOSTER 2,328,133

PULL LINE DRUM AND MOUNTING Filed Nov. 21, 1 941 2 Sheets-Sheet 1 jg. Z. I

INV EN R.

1, 1943. w. w. FOSTER Y 2,328,133

PULL LINE DRUM AND MOUNTING Filed Nov. 21, 1941 2 Sheets-Sheet 2 INVENTOR.

Patented Aug. 31, 1943 v UNITED STATES PAT NT crews Application November 21, 1941, Serial No. 419548;

This invention relates to wire. line spools and catheads and more particularly to catheads employed for making up and breaking out pipe joints suchaswelicasingandtubing. i i The principal object of the invention is provide a novel form of drum or cathead mounting whose outstanding characteristic resides-in the fact that while the drum is inconcentric relation to a constantly rotating shaft and receives its rotation therefrom through cooperating clutch elements, it is moved, out of the rotative influence of any revolving element when iii-inoperative position. This feature oithe invention, in eliminating any tendency of the drumto crawl or continue to revolve by frictional contact with moving parts, insures the safety of workmen by minimizing hazards caused by undesired winding'oi the line onto the drum. Another object of the invention is to provide ineansymade necessary or desirable by the peing a part of thiSImGQhm Smband' which-will-be presently described;v are designed for extensibility to provide for wear on'theclutchwmrtst y In the drawings", referencenumeral "denotes a constantly rotatingshaft suchas a draww'orks line; shaft and. upon which is fixed, 1330 means of a key If, a. sleeve I12. Theireaiilend of'tlrisslceve has an integral thrust fiance Heiojwhichrefer- Usher form of clutch actuating mechanism ems played, to predetermine the frictional setting of the clutch elements. In'other words, the clutch actuating mechanism includes coaxially extensible thrust pins independently adjustable and it is to insure uniformity of such adjustments that this latter means is provided. with theforegoing objects as paramount, the invention has further reference to certain features of accomplishment to become manifestas the description proceeds, taken in connection with the accompanying drawings wherein: p

Figure 1 is an elevationai view of a drum'and mountingin vertical section;

Figures is a fragmentary' detail view of the clutch actuating levertand the attendant means i for holding the same stationary preparatory to reflecting uniform adjustment of the thrust means 01' the clutch. Figure 3 is a'detail view in elevation of one of the clutch thrust pins, Figure 4 is a transverse section onFigure 3. l t p Figure 5 is a front end view of the cathead and mounting, and Ffigure'fi is a rear end view on line 5-6 on Figure 1, showing portions broken. away.

In continuing further and in greater detail with the drawings, it is first pointed out that while the invention may find many other uses it has en Pr m y designed for setting up and: breakingout joints of wellpipe and in this. connecit wil'llbe observed that the present. invenon line 1-4 ence will be again made later: and; formediupon its forward end and internally thereofis a-. bolt flange l4, against" which the internal-flange ii of the spool] 6- bears. Bolts-H pass through holes in the flange; I5 and are threadedinto ali'ned holes in the flange ii. to secure the spool Hi im fixed relation" to the sleeve 1:2 and consequentip the shaft Hi. The spool l6 haslan' exterior: flange" which, as will become; apparent presently, forms a a part of the friction clutch to be described.

tion utilizes a term at thrust mechanism. for the 165 Mounted concentrically on, the sleeveflisla second sleeve it having an integrai mounting arm 2|! thereon. provided with a bolt hole 'il through which a bolt is passed into a: suitable support, not shown, and her which the sleeve I9 is held against rotation. z

Intermediate-the two'sieeves t2 and, there are provided two setsoi roller bearings 12, co'mand wound the service line 21. The forward end of the drum has a jclutch flange zd, compier'nentar-y to the flange IBearrie-d by thespool l0 and previously referred to. The fiangelfi is faced with suitable brakematerial 29 which, .vwhenithe drum 26 is advanced toward the spool IE to effect engagement betweenjthe. facing. 28 and the face of the flange i3, suflicient irietion obtains to 50 secure. the drum and spool for rotation to wind the line 2-1 on the A bushing 30' surrounds the sleeve ia ybctweenthe said sleeve and drum 2G, end st the outencnd on this bushing an oilurecess 33!: is provided winch communicates with a passage 32: Mg'.1 inthe drumfla'nge lfl the flanges I2 and 28.

' drum is requiredto .be'idle.

and by which excess oil is diverted from the friction lining 29 of the clutch elements.

Opposing the flange 28 of the drum 26 is an. other and inner flange 33. This flange is so shaped relative to the drum as to define an annular recess 34 to receive a collar 35. This collar is free for limited oscillating movement in the recess and has an annular groove in the face thereof next adjacent the drum 25, which receives -'a ball race 36 to minimize friction between the collar and drum when the former is urged against the latter in a clutching operation, to be presently described.

The clutching mechanism by which the drum '25 is shifted to bring the flanges 28 and is into frictional engagement is comprised of a series of extensible thrust pins 31, one of which is shown in detail in Figure 3. These pins are each comprised of the hexagonal, internally threaded female member 38 having a spherical head 39 and which receives the male member 48, the latter being also provided with a spherical head 4! as well as a hexagonal-intermediate section 42 by which it is rotated to effect axial adjustment of I the pin." When the proper length adjustment has been obtained, a lock nut 43 is tightened against the hexagonal body '38 to maintain fixed relationship between the members. Y .1 The spherical heads 39 of the pins are received in sockets provided in the face of the collar 35 opposite the ball race 39 and held therein by plates 44. The opposite heads 4| of the pins are received in sockets provided in the inner face of a flange45 on the rear end of the sleeve 26 and held inposition by means of plates 45 (Fig. 6).

I each other and urging the collar and consequently the drum towards the spool I5 to engage This action will of course, secure the drum in rotative engagement with the spool, which is constantly rotating in view of its 1 fixed relation to the shaft H1.

The means bywhich actuation of the thrust pins, as described, is brought about, is comprised of ,a lever 41 having a bifurcated end 48 (Figs. 2

. and 6) which is secured by means of bolts 45 to H the collar 35. By oscillating this lever, similar motion is imparted .to the collar which actionv as stated, tends to move the pins from their relatively inclined positions to a position approaching but not attaining parallel, to shift the drum 26.

Resisting the action of the lever in its. opera- I tive movements is a spring 55, adjustably conto the inner face of the flange of the stationary sleeve I9. This plate 54 and consequently the arm 53, being stationary with the mounting, causes the lever 41, through spring 50 to return to its original inoperative position each time it is actuated, to return'the drum 26 also to its inoperative positiomout of engagement with the spool l6 and entirely out of the rotative influence of any rotating element. Accordingly, there is no tendency whatever, for the drum to crawl or be given to erratic movements common to many types of cable drums when parts are permitted to come into. frictional relationship when the This is usually the result of wear but in the presentcase wear will have no effect in causing the undesirable results hereinbefore expressed.

In order to vary the degree of friction between the friction lining 29 and the surface of the spool flange [8, the thrust pins 31 are adjusted as to length. To increase the friction at this point, the male element 40 is rotated to elongate the pin and after the desired adjustment obtains, the lock nut 4| is secured. Of course, for optimum results, the pins should all be adjusted to identically the same length to. insure equalization of pressure throughout the friction area.

Uniformity of thrust pin adjustment is effected by first rotating the clutch lever 4'! to a I position, against the resistance of spring 55, to

shift the drum 26 toward the spool. Then, a pin is inserted into holes 55 (Fig. 2) in the plate 54 and lever 41 which holes will become alined when the thrust pins 31 have attained a position nearly parallel with each other. With the lever 41 thus locked in position by the pin 55, the thrust pins 3'! are each adjusted to the same length after which the lock pin 55 is withdrawn from the alined holes 56 to allow the lever to be returned by the spring 50 to'its original inoperative position.

It is believed that the foregoing description includes such reference to the cooperation of related parts asto render the operation of the machine as a whole clearly apparent without a separate description of operation. V

Manifestly, the construction as shown and described is capable of'some modificationand such modification as may be construed to fall within the scope and meaning of the appended claims is also considered to be' within the spirit and intent of the invention. i v

What is claimed is: 1. A cable drum and mounting therefor the combination comprising, a constantlyrevolving shaft, a sleeve mounted on and rotatable with said shaft, a spool fixed to said sleeve having flanges, one of which is perpendicular to the axis of said shaft, a second and flanged sleeve surrounding said first sleeve and held against rotation, a longitudinallyv slidable drum mounted wholly on said second sleeve, one of the flanges thereof having a surfaced area parallel to and engageable with the flange face of said spool to secure the same in common rotation therewith,

said drum further having1a circumferential shoulder adjacent its opposite flange to define an annular recess, a collar mounted in said recess for sliding but limited oscillatory movement on said second sleeve, a plurality of normally inclined and axially adjustable thrust pins radially I disposed between said collar and the flange of said second sleeve and collectively actuatable toward relatively parallel positions to slidin gly move said drum, an apertured lever afliXed to and extending radially from said'collar for actuating said thrust pins, an arm aflixed to the flange of said second sleeve having an aperture alignable with that of said lever to receive jointly therewith a means for maintaining operative position of said lever preliminary to, effecting uniformity of length adjustment of said pins, and spring means connecting said lever and arm for return- 4 ing said lever to inoperativeposition when actuated.

2. A pull line drum and mounting comprising in combination, a rotating shaft, a sleeve affixed to the end of said shaft for rotation therewith, a second and stationary sleeve floating on said first sleeve having a mounting flange, a flanged carrying a pullline and mounted forrotating and limited sliding movement wholly on said sleeve, an annular recess formed adjacent the inner flange of said drum, a. collar conformably disposed in said recess, afianged spool aflixed to the end of said first sleeve having a flange whose face is in perpendicular relation to said shaft and parallel with the face of the outer flange of said drum and against which the latter flange is engaged to eflect rotation 01 said drum,.a plurality of longitudinally adjustable pins, each having an WALTER W. FOSTER; 

